Writing Automated tests in Drupal 9
This is a start.
Install PHP Unit: PHPUnit8.4+ for Drupal 9
For the current portal, add core-dev option
Drupal requires Prophecy PhpUnit when using PHPUnit 9 or greater.
composer require --dev phpunit/phpunit ^8.4For the current portal, add core-dev option
composer require 'drupal/core-dev:^9.5'
composer updateDrupal requires Prophecy PhpUnit when using PHPUnit 9 or greater.
composer require --dev phpspec/prophecy-phpunit:^2'